Chip giant ARM Holdings is giving the technology hardware and equipment sector a boost today after booming demand for mobile phones, tablet computers and other low-powered devices meant 2010 saw the highest ever annual revenues, profits and cash generation.Filtronic shares are also on the rise despite yesterday's results which said that the radio systems products maker generated a six-month loss compared to a profit last year.The aerospace and defence sector is the only losing sector on Tuesday, led lower by defence blue-chip BAE Systems.Outsourcing services and technical personnel provider Morson, which provides contractors to BAE, said trading in the latter part of last year remained challenging, pulling both shares in the red.Top performing sectors so far todayTechnology Hardware & Equipment 729.02 +4.83%Chemicals 6,988.71 +3.12%Software & Computer Services 741.47 +2.64%Mining 26,465.95 +2.60%Oil Equipment, Services & Distribution 25,612.36 +2.59%Bottom performing sectors so far todayAerospace and Defence 3,386.29 -0.69%Aeronautics and Defence NULL 0.00%Alternative Investment Instruments NULL 0.00%Automotive and Parts NULL 0.00%Banking NULL 0.00%